<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <!-- <h2 :style="{key(属性名): value(属性值)}">{{message}}</h2> -->
      <!-- 要加上单引号 value当作对象来解析-->
      <!-- <h2 :style="{fontSize: '50px'}">{{message}}</h2> -->
      <!-- finalSize当成变量来使用 -->
      <h2 :style="{fontSize: finalSize + 'px',color: finalColor}">
        {{message}}
      </h2>
      <!-- 做一个抽取 -->
      <h2 :style="getStyle">
        {{message}}
      </h2>
    </div>

    <script src="../js/vue.js"></script>

    <script>
      const app = new Vue({
        el: "#app",
        data: {
          message: "你好",
          finalSize: 100,
          finalColor: "red",
        },
        methods: {
          getStyle: function () {
            return { fontSize: this.finalSize + "px", color: this.finalColor };
          },
        },
      });
    </script>
  </body>
</html>
